Engines and Components› Camshafts and Valvetrain
Supertech
Dual Valve Spring Kit with Retainers and Locators
SKU: SPRK-MM18D
Advanced — 4+ hours
Description
The kit includes 16 springs, 16 retainers, and 16 seat locators. The springs feature a gas nitriding process followed by shot peening for improved fatigue life. Specifications include a seat pressure of 85 @ 33.60, open pressure of 205 @ 10, and a maximum lift of 12.90mm.
Fitment
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Specifications
| Brand | Supertech |
| Part Number | SPRK-MM18D |
| Category | Engines and Components |
Buy with Confidence
Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.
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